Patents by Inventor Ki T. Lee

Ki T. Lee has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for drying carboxyl containing polymers of vinylidene monomers
    Patent number: 4954615
    Abstract: A slurry mixture comprising a carboxyl containing polymer of vinylidene monomers having at least one terminal methylene group and a polymerizing solvent is effectively dried by way of: passing said mixture through one or a plurality of preheated double pipe heat exchangers in order to produce a two-phase mixture comprising the pulverized polymer and the vaporized solvent; and, then, feeding said two-phase mixture to a rotary vacuum dryer in order to further remove and separate the vaporized solvent from the powdery polymer.
    Type: Grant
    Filed: June 17, 1988
    Date of Patent: September 4, 1990
    Assignee: Korea Steel Chemical Co., Ltd.
    Inventors: Jong S. Kim, Ki T. Lee, Dong B. Shu